I'm using www.getabstracts.com, and got this answer when asking about download options for Sony Reader format:

Dear Helge,
Thanks for your note and your interest in getAbstract.
The format will be available in approximately 2 months.
We would be glad to welcome you at getAbstract soon.

Sincerely
Jan Schwickerath


I'm looking forward to that!!

Great find! That one's a bit expensive ($300/yr unless you get only 30/yr). I hope other executive summary companies follow with the same format.